robof16
October 19th, 2018, 02:13 PM
Coincidence or tune?
2000 Yukon XL with transplant 6.0L…
AC worked fine before and after engine swap.
E-fans installed long before engine swap and working fine also, both speeds.
AC pressures good, pressure switches checked.
Condenser not blocked.
Multiple tune iterations later, while working on idle quality, at some point the AC compressor stopped working at low RPM/idle. It takes about 1500 RPM to get compressor to kick on.
Figured it was a tired old compressor so I replaced with new Denso unit followed by vacuum and charge with correct amount (by weight) of R134a. Same problem continues. AC works great when compressor operates, even before compressor change.
Is it possible that there is a (for lack of better term) glitch associated with tuning?
2000 Yukon XL with transplant 6.0L…
AC worked fine before and after engine swap.
E-fans installed long before engine swap and working fine also, both speeds.
AC pressures good, pressure switches checked.
Condenser not blocked.
Multiple tune iterations later, while working on idle quality, at some point the AC compressor stopped working at low RPM/idle. It takes about 1500 RPM to get compressor to kick on.
Figured it was a tired old compressor so I replaced with new Denso unit followed by vacuum and charge with correct amount (by weight) of R134a. Same problem continues. AC works great when compressor operates, even before compressor change.
Is it possible that there is a (for lack of better term) glitch associated with tuning?